User's Manual

3
AWID PROPRIETARY
1.0 INTRODUCTION:
AWID's Sentinel-Prox LR-911 Reader is a long-range (9 to 11 feet) reader that works with
paper-thin passive windshield mounting tags or credit card size tags. This reader comes with a
unique combination of long read range, small size and low power consumption. LR-911 has an
internal power DC/DC converter, allowing it to work with wide range of supply inputs without
affecting its performance. With a 16 V DC supply, its current consumption is less than 400 mA,
making it possible to be powered directly from the supply in the access control panel, thereby
eliminating the need for an external supply. LR-911 has simultaneous Wiegand and RS-232
outputs, its primary applications are automated parking garage entrance control, hands-free
access control, asset tracking and asset management applications.
1.1 General Descriptions:
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Wall mount or post mount reader
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Indoor or outdoor installation
1.2 Special Features:
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Thin passive tags with long range performance
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Designed for automated operation with tags mounted on automobile’s windshield
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Simultaneous Wiegand (Access Control) and RS-232 (transaction control) outputs
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Permanently sealed electronics for indoor or outdoor applications
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UV stabilized plastic housing
1.3 Suggested Applications
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Garage Gate Control
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Asset Management
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Item Tracking
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RFID
2.0 PRINCIPAL OF OPERATION
This Radio Frequency Identification (RFID) reader uses radio frequency to identify, locate and
track people and objects that carry the appropriate transponders. RFID readers can work in
none line-of-sight situations and in darkness, bright sun light or through dirt, grime and
smudges.
A typical RFID system consists of three components – an interrogator or reader, a transponder
or card and a data processing panel and/or computer combination. Most RFID readers have an
internal micro-controller, transmitter, receiver and a shared transmit/receive antenna. The card
is usually passive (no internal battery) and consists of an antenna and RFID ASIC (Application
Specific Integrated Circuit). During operation, the transmitter sends out an electromagnetic
wave to establish a zone of surveillance. When a transponder enters this zone, the
electromagnetic energy from the reader begins to energize the IC in the